Question

Explain the following terms:
A. Amplitude
B. Wavelength
C. Frequency

Answer 1

Hint: Meaning of word ‘amplitude’ is simply maximum distance covered by object. Wavelength itself seems like distance. So distance between two consecutive or adjacent points in a wave. Frequency is nothing but rate over which something is repeating. Just like metro frequency.

Complete step by step solution:
Amplitude: Consider an example of a pendulum in a watch. If you will notice then the pendulum in a watch never goes after a certain distance from its centre point. That’s its maximum distance and centre point or position called as mean position. So the maximum distance covered by an object or partial on either side of its means positions, called amplitude. It is generally denoted by letter a or A.

Wavelength: See the graph of sine waves. Distance cover from 0 to 2 is known as wavelength. Hope you get the picture in your mind. Wavelength is the distance travelled by wave in one complete period in a given medium. It is generally represented by $\lambda $. In interference, wavelength is nothing but distance between two consecutive crests or troughs. In sound waves, distance between two consecutive or adjacent compression or rarefaction is called wavelength.

$\lambda =\dfrac{v}{f}$
Where, v is velocity
     f is frequency
Frequency: Take an example of metro. if you will stand at metro stations then you will usually hear from people as ‘metro frequency’. Then what is it? At fixed periods of time how many times metro arrives at stations. That's called frequency. It is the number of vibrations made by a particle or an object in a second/period in a given medium. It is generally denoted by f or $\upsilon $.

Note: You can define above terms by calculating formulas. Wavelength is nothing but distance divided by time and inverse of time is nothing but frequency. It will be a lot easier if you will get an idea of this from the formula too. Above terms define little difference in astronomy physics.